WEG CFW-11 - CHAPTER 1 General Instructions; About the Manual; Terms and Definitions

General Instructions
2-1
2
GENERAL INSTRUCTIONS
2.1 ABOUT THE MANUAL
This manual exposes how to install, to start-up in V/f (scalar)
mode, the main characteristics and shows how to troubleshoot
the most common problems of the CFW-11 inverter series frame
size E models.
It is also possible to operate the CFW-11 in the following control modes: V V W, Sensorless Vector and Vector with
Encoder. For further details on the inverter operation with other control modes, refer to the Software Manual.
For information on other functions, accessories, and communication, please refer to the following manuals:
Software Manual, with a detailed description of the parameters and advanced functions of the CFW-11.
Incremental Encoder Interface Module Manual.
I/O Expansion Module Manual.
RS-232/RS-485 Serial Communication Manual.
CANopen Slave Communication Manual.
Anybus-CC Communication Manual.
These manuals are included on the CD supplied with the inverter or can be downloaded from the WEG website
at - www.weg.net.
2.2 TERMS AND DEFINITIONS
Normal Duty Cycle (ND): Inverter duty cycle that defines the maximum continuous operation current (I
RAT-ND
) and
the overload current (110 % for 1 minute). The ND cycle is selected by setting P0298 (Application) = 0 (Normal
Duty (ND)). This duty cycle shall be used for the operation of motors that are not subjected to high torque loads
(with respect to the motor rated torque) during its operation, starting, acceleration, or deceleration.
I
RAT-ND
: Inverter rated current for use with the normal duty (ND) cycle.
Overload: 1.1 x I
RAT-ND
/ 1 minute.
Heavy Duty Cycle (HD): Inverter duty cycle that defines the maximum continuous operation current (I
RAT-HD
)
and the overload current (150 % for 1 minute). The HD cycle is selected by setting P0298 (Application) = 1
(Heavy Duty (HD)). This duty cycle shall be used for the operation of motors that are subjected to high torque
(with respect to the motor rated torque) during its operation, starting, acceleration, or deceleration.
I
RAT-HD
: Inverter rated current for use with the heavy duty (HD) cycle.
Overload: 1.5 x I
RAT-HD
/ 1 minute.
Rectifier: Input circuit of inverters that transforms the AC input voltage in DC voltage. It is composed of power
diodes.
Pre-charge Circuit: Charges the DC bus capacitors with limited current, which avoids higher peak currents
at the inverter power-up.